package com.yuyu.qingmangmall.cart.controller;

import com.yuyu.qingmangmall.cart.interceptor.CartInterceptor;
import com.yuyu.qingmangmall.cart.service.CartService;
import com.yuyu.qingmangmall.cart.to.UserInfoTo;
import com.yuyu.qingmangmall.cart.vo.Cart;
import com.yuyu.qingmangmall.cart.vo.CartItem;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.util.List;
import java.util.concurrent.ExecutionException;

@Controller
public class CartController {

    @Autowired
    CartService cartService;

    /**
     * 浏览器有一次cookie；user-key：标志用户身份，一个月后过期；
     * 如果第一次使用jd的购物车功能，都会给一个临时用户身份
     * 浏览器以后保存，每次访问都会带上这个cookie
     *
     * 登录:session有
     * 没登录：按照cookie里面带来user-key来做
     * 第一次：如果没有临时用户，帮忙创建一个临时用户
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model){
        // 快速得到用户信息，id user-key
        UserInfoTo userInfoTo = CartInterceptor.threadLocal.get();
        Cart cart = cartService.getCart(userInfoTo);
        model.addAttribute("cart",cart);

        return "cartList";
    }

    /**
     * 添加商品到购物车
     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes ra) throws ExecutionException, InterruptedException {

        cartService.addToCart(skuId,num);
        ra.addAttribute("skuId",skuId);
        return "redirect:http://cart.qingmangmall.com/aadToCartSuccessPage";
    }

    @GetMapping("/aadToCartSuccessPage")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId, Model model){
        CartItem cartItem = cartService.getCartItem(skuId);
        model.addAttribute("cartItem",cartItem);
        return "success";
    }

    @GetMapping("/currentUserCartItems")
    @ResponseBody
    public List<CartItem> getCurrentUserCartItems(){

        return cartService.getCurrentUserCartItems();
    }
}
